Warheads are interesting critters. Put them in the a planet, moon, or asteroid and you get a beautifully crafted spherical void that's reminiscent of the damage sphere caused by a Star Wars thermal detonator. But put that same warhead in a ship or station and the damage is erratic. Maybe blowing up "ground" results in a smooth crater because the ground is homogeneous whereas, for the most part, ships and stations are not. But a warhead's damage pattern has always seemed inconsistent to me.